查询词典 induction current

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

The simulation results demonstrate that, within the physical ranges of the model parameters, the correlation functions of hole hoppings giving rise to closed current flow patterns in the circulating current phases are larger by one order of magnitude than those of hole hoppings corresponding to open current flows.

模拟结果表明，在适当的Hamiltonian量参数范围内，对应于闭合回路算符的关联函数在相同距离上比其他所有算符对应的关联函数大一个数量级，因此证明了在三带Hubbard模型中存在环形电流相。

We have found that, within the physical ranges of the model parameters, the correlation functions of hole hoppings giving rise to closed current flow patterns in the circulating current phases are substantially larger than those of hole hoppings corresponding to open current flows.

通过模拟发现，对应于闭合环形的关联函数在相同距离上要比其他所有没有闭合的关联函数大得多，因此证明在三带Hubbard模型中存在环形电流相。

Therefore the use of electronic current transducer as the measure unit of distance protection is suggested in this paper. The working principles and characteristics of electronic current transducer are introduced. Then the improvement on the starting component, phase selecting component, impedance component and other functional component of distance protection by using of optical current transducer is discussed afterward.

因此该文提出了采用电子式电流互感器作为距离保护的测量元件的建议，论证了采用光学电流互感器对距离保护起动元件、选相元件、阻抗元件及其他功能元件等带来的优越性。

A current integral calculation unit integrates the value of the sampled motor current over a sampling period to calculate and output a current integral to an abnormality determination unit.

电流积分计算单元在采样时间段上积分采样电机电流，以计算电流积分并输出其到异常判断单元。

Operational Tran conductance lifers and Grounded actorhas become one of the most important methods to implement integrated continuous-time filters. Operational Tran conductance Amplifierscan transfer input voltage into current to output,and control or change output current within large range by an external controlling current of amplifier. Most articles consider OTA as a voltage-mode circuit component and give voltage-to-voltage transfer function of all having been implemented filter circuits,i.e. The input signal and output signal of filter circuits are voltages .

运算跨导集成运算放大器OTA ( Operational Tran conductance Amplifier 以下简称跨导运放)的功能是将输入电压转换为电流输出，并通过外加偏置电流控制运放的工作电流，从而使它的输出电流在较大范围内变化，而在大多数文献中，器件都被作为电压模式元器件使用实现的各种滤波电路都是按传送电压比给出的，即滤波电路输入信号和输出信号均为电压信号。

The mathematical models for overall breaking process of circuit breaker are developed, through which the driving mechanism and the arc chamber, the interruption performance and the opening velocity are closely connected, the breaking process under different interrupting conditions are simulated, then the arcing time difference is determined. The interrupting conditions include line charge current, breaker terminal fault current and short line fault current .

本文建立了一种把操动机构与灭弧室相联系、开断性能与运动特性相联系、一维和二维模型相结合的压气式SF6断路器开断性能的仿真方法，对不同开断条件下（包括线路充电电流开断、不同试验方式的端子短路开断、不同试验循环的近区故障）断路器的开断过程进行了分析，用仿真的方法确定了断路器在不同开断条件下能成功开断的燃弧时差，并给出了开断性能与运动特性之间的关系。

Weigh's addition minishes the loss of net's volume in pure current, but makes no differnce in the pure wave condition. After installed of sinking ring or lower ring, the loss of net's volume is decreased. The loss of net volume is more in the current combined with wave condition than in the pure current condition.

在纯流条件下，增大配重均有利于减小网箱的体积损失；而在纯波条件下，配重的增加对于改善网衣的变形没有实质性的意义；设置了底圈或沉降圈后，均能在一定程度上减小网衣的体积损失；波流组合条件下网衣的体积损失要明显大于纯流条件下的体积损失。

L Soft Starts, starts current is less than rated current; traditional Y-△ starts is 3～5 times rated current, waste energy.

l 软启动，启动电流小于1倍额定电流，普通空压机Y-△启动，3～5倍额定电流，更耗能

See "e-paper" on page 1986, a concept of "Open-phase Motor Protection Discussion Summary," International Electrotechnical Commission to IEC202-1 low-voltage motor starter ② set out by the two-phase motor rated current up to 1,15 times rated current , while the third phase by 0.9 times the rated current to 0, the starter should be in action within 2h.

见《电子报》1986年1观页《电动机断相保护讨论小结》入国际电工委员会IEC202－1低压电动机起动器）中规定之②在电动机两相由额定电流升至1、15倍额定电流，而第三相由0.9倍额定电流降至0时，起动器应在2h内动作。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我